Monkey-wrench.



S. WYTRWAL.

MONKEY WRENCH.

APPLECATXOIE FILED MAI 1.17, 29!?- Pateute Dec. 17, 1918.

35 1 G/HZOWW STANISLAW WYTRWAL, OF SCRANTON, PENNSYLVANIA.

MONKEY-WRENCH.

Specification of Letters Patent.

Patented Dec. 17, 1918.

Application filed March 17, 1917. Serial No. 155,443.

I '0 all whom it may concern:

Be it known that I, STANIsLAw WYTRWAL, a citizen of the United States,resident of Scranton, county of Lackawanna, and State of Pennsylvania,have invented certain new and useful Improvements in Monkey- VVrenches,of which the following is a specification.

This invention relates to improvements in wrenches, and has as itsspecial object the provision of means whereby a movable jaw may besecurely held at any adjusted position along the shank by automaticallyopcrating means.

A further object is to provide auxiliary means whereby the movable jawmay be locked or clamped rigidly with relation to the shank in additionto the main holding means.

These and other like objects are attained 'by the novel design,construction and combination of parts hereafter described and shown inthe accompanying drawing, forming a material part of this disclosure,and in which Figure 1 is a side elevational view of a wrench made inaccordance with the invention, parts being in section to show theconstruction.

Fig. 2 is a rear view of the same.

Fig. 3 is a fragmental sectional view similar to that of Fig. 1, butshowing the parts in another position, and

Fig. 4: is a sectional view taken on line -i4c of Fig. 1.

The wrench comprises a rigid shank 10 having an integrally formed heador jaw 11 at one end, and a handle 12 at the other, these parts being ofthe usual construction.

Slidably engaged with the shank 10 is a movable jaw 14 having a pivoteddog 15, the pin 16 of which passes transversely through the sides of themovable jaw.

Another pin 17 acts as a fulcrum for the lever 18, fulcrumed in the slot21 formed in the jaw 14:, and having a curved outstanding projection 19furnished with a knob or head 20 at one end, the other end beinghingedly engaged with a link 22 encircling the dog 15 and being held inrelation thereto by means of the recesses 23 formed. in the sides of thedog 15, the dog being normally held in engaging position with the teeth25 by means of the flat spring 26 secured in the recess 27 formed in themovable jaw.

The opposite side of the bar or shank 10 is formed with a plurality offine projections or corrugated surfaces 28 adapted to engage withcorresponding corrugations 29 formed in the rear element 30 of themovable jaw 14.

A hub 31 extends outwardly from the rear element 30, the same beingscrew-threaded and adapted to receive the knurled headed screw 32, whichis of sullicient length as to engage with the shank through the hubwhereby the movable jaw may be held in an adjusted position.

In operation, the wrench being applied to a nut or other article to beturned, the movable jaw 14 is adjusted by hand into engagement with theopposite side of the article contacting with the fixed jaw 11, whereuponthe dog 15 will engage with the teeth 25 holding the same rigidly inposition for operation.

When it is desired to remove or release the movable jaw 14, the same isaccomplished by depressing the finger knob 20, whereby the dog 15 israised out of engagement with the teeth 25 allowing the jaw to slidealong the shank.

At the same time, the screw 32 may be used to engage the movable jawwith the shank at any desired point, forming in effect an auxiliaryclamping means therefor.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

A wrench including its handle, relatively large ratchet teeth upon oneside of its shank and relatively small teeth upon the opposite sidethereof, a jaw formed at one end of the shank, a movable jaw slidableupon said shank to and from said stationary jaw, a pawl carried by themovable jaw for engaging the larger of the ratchet teeth and preventingmovement of the movable jaw, a handle carried by the movable jawassisting in operating the wrench, a threaded stem carried by the shankand threaded in said movable jaw, the threads of said stem adapted toengage the smaller of the ratchet teeth, substantially as described andfor the purpose set forth.

In testimony whereof I have afiixed my signature.

STANI SLAW WYTRWAL.

copies of this patent may be obtalned tor five cents each, by addressingthe Gomminioner 0t Iatenta,

Wuhlnzton, D. 0.

